China can stop tech workers from leaving under new security rules

Other provisions apply to some citizens returning after illegal or criminal acts abroad. If those acts harmed national security or national interests, authorities can impose an exit ban lasting six months to three years.

Foreign nationals can receive entry bans of one to five years for making false visa statements. Reuters reported that travel limits already applied to senior officials and state executives with access to confidential information. The new rules tie technology security and export controls more directly to decisions at the border.

The rules took effect Tuesday, so there is no enforcement record yet. The language on technology security leaves room for officials to decide when it applies. The public text does not define which jobs, data or technologies can trigger a ban.

Authorities may use the rules only for serious export-control cases. They may also use them to restrict ordinary private-sector movement. Enforcement records are needed before the evidence supports either reading.

China could publish guidance that names covered technologies and the agencies allowed to request an exit ban. Court challenges, company notices and consular cases would show how officials use the rules.

Semiconductor, battery, solar and rare-earth employers will provide early tests. Their workers carry the technical knowledge that export rules are meant to protect.